Evidence for the Rare Decay B+ --> Ds+ pi0

Details Evidence for the Rare Decay B+ --> Ds+ pi0 Evidence for the Rare Decay B+ --> Ds+ pi0

2006-11-15

arxiv.org/abs/hep-ex/0611030v2

Phys.Rev.Lett.98:171801,2007

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 postscript figures (1 figure removed), accepted by Physics Review Letters

Scientific paper

10.1103/PhysRevLett.98.171801

We have searched for the rare decay B+ --> Ds+ pi0. The analysis is based on a sample of 232 million Upsilon(4S) --> B anti-B decays collected with the BABAR detector at the PEP-II e+ e- storage ring. We find 19.6 signal events, corresponding to a significance of 4.7 sigma. The extracted signal yield including statistical and systematic uncertainties is 20.1+6.8+0.4 -6.0-1.5, and we measure B(B+ --> Ds+ pi0) =(1.5 +0.5 -0.4 +- 0.1 +- 0.2) 10^-5, where the first uncertainty is statistical, the second is systematic, and the last is due to the uncertainty on the Ds+ decay and its daughter decay branching fractions.

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